Clamping mechanism.



J. M. THOMPSON.

GLAMPING MECHANISM.

APPLIOATION FILED JAE. 24, 1906.

Patented Feb. 16, 1909.

UNITED TATES PATENT OFFICE.

JAMES M. THOMPSON, OF MILWAUKEE, WISCONSIN, A SSIGNOR TO LUTHER BROS. 00., OF MILWAUKEE, WISCONSIN.

CLAMPING LLECHAN ISM.

Specification of Letters Patent.

Patented Feb. 16, 1909.

To all whom it may concern;

thereof is in oscillative connection with a Be it known that I, JAMES M. THOMPSON, butt G having a pivot-shank 2' held by a seta citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and Stateof Wisconsin, have invented certain new and useful Improvements in Clamping Mechanism; and I do'hereby declare that the following is a full, clear, and exact description thereof.

The invention has for its object to facilitate grinding of skate-runners, and it consists of a simple, economical and eflicient mechanism comprising a suitable clamp and an oscillative expansile and contractile radius carrier with which the clamp has oscillative connection, the carrier being attachable to any suitable support and provision had for adjustments of said carrier to properly aline a clamped skate-runner with a rotary grinding-wheel; said invention being hereinafter more particularly set forth with reference to the accompanying drawings and also hereinafter claimed.

Figure 1 of the drawings represents a plan view partly in horizontal section of a skaterunner clamp and carrier for same in accordance withmy invention, a clamped skate and grinding-wheels being illustrated by dotted lines in the same figure, Fig. 2, a partly sectional side elevation of what is shown in Fig. 1, and Fig. 3, a side elevation of a fragment of the clamp partly in section on the plane indicated by line 33 in said Fig. 1.

Referring by letter to the drawings, A indicates each of a pair of split-grips that are for the most part of preferably elliptical form and fastened, by a set-screw b or otherwise, to an arbor B for which a head C is provided with bearings c, a shank d of this head being in oscillative connection with a section D of a jointed bracket. At the split, each grip is provided with a ledge 6, upon which to rest a skate-runner, and also a bearing f for a binding screw E opposed to said runner.

The grips, binding-screws, arbor and head above specified constitute the clamp element of the mechanism herein set forth, and to limit rock. of said arbor and grips in one direction, said head is provided with an arm 9 constituting a bearing for a stop-screw h in opposition to one of the aforesaid rips.

T e'jointed bracket is one suitab e orm of a variable radius carrier, and a section F screw 9' in a stud 7c of a plate H, which plate has alined slots m thereof engaged by bind ingscrews or engaging another plate I that is attachable by bolts or other suitable means to a wall, post or other suitable support, a fine adjustment of the plate first aforesaid being determined by an opposing screw 0 engaging a lug p of the other plate, and this adjusting screw has a set-nut 9 run thereon in opposition to said lug. The adjustment of the plate H, longitudinally of the plate I, and the pivotal adjustment of the oscillative jointed bracket determines the proper alinement of a clamped skate-runner with relation to a grinding-wheel so as to present said runner to said wheel parallel to the axis of same, the clamp and said bracket being manipulated to suit the operator during a grinding operation.

I claim:

1. An oscillative expansile and contractile radius carrier attachable to a suitable support, a head in oscillative connection with the carrier, and skate-runner clamp grips in rocking connection with the head.

2. An oscillative expansile and contractile radius carrier attachable to a suitable support, a head in oscillative connection with the carrier, skate-runner clamp-grips in rocking connection with the head, and means limiting the rock of the grips in one direction.

3. An oscillative pivotally adjustable expansile and contractile radius carrier adjust able on a plane parallel to a suitable support to which it is attachable, a head in oscillative connection with the carrier, an arbor mounted to turn in the head and skate-runner clamp-grips fast on the arbor.

l. A skate-runner clamp comprising splitgrips having opposing runner -supporting ledges and binding screws at the splits thereof, and an oscillative expansile and contractile radius carrier for the clamp attachable to a suitable support.

5. An expansile and contractile bracket attachable to a suitable support, a head in oscillative connection with the bracket, skaterunner clamp-grips in rocking connection with the head, and means also in connection with said head for limiting rock of the grips in one direction.

6. An eXpansi-le and contractile radius car-.

rier in pivotallyad-justable connection with a support, means for holding the carrier in its Ppivotally adjusted position, and a skate 5 runner clamp in connection with said carrier. 7. An expansile and contractile radius carrier, a plate vertically adjustable in connection with a support means for holding the plate iiradjusted position, means for 10 holding the carrier in pivotally adjusted connection with said plate, and a skate-runner clamp in connection with said carrier.

In testimony that I claim the foregoing I have hereuntoset my hand at Milwaukee in the county of Milwaukee and State of WVis- 15 consin in the presence of two witnesses.

JADAES lVI. THOBIPSON.

Witnesses GEORGE FELBER, N. E. OLIPHANT. 

